docs: def unprefix(self, path):
          """Remove the self.prefix_ (if present) from a path or list of paths"""
          path = self.strip(path)
          if isinstance(path, six.string_types):
              path = path[len(self.prefix_):] if path.startswith(self.prefix_) else path
              path = path[1:] if path.startswith(self.separator) else path
              return path
          if isinstance(path, (list, tuple)):
              path = [p[len(self.prefix_):] if p.startswith(self.prefix_) else p for p in path]
              path = [p[1:] if p.startswith(self.separator) else p for p in path]
              return path